Stuffing-box.



J. SIEGER.

STUFFING BOX.

APPLICATION FILED MAR.28, 1905.

f 3 Is [MW-M Ill PATENTED" MAR. 27, 1906.

J OSEF SIEGER, OF HORDE, GERMANY.

STUFFING-BO-X.

Specification of Letters Patent.

Patented March 27, 1906.

Application filed March 28, 1905. Serial No. 252,531.

To a whom it may concern.-

Be it known that I, JosEF SIEGER, a subject of the German Emperor,residing at Horde, Westphalia, in the Kingdom of Prussia, Germany, haveinvented certain new and useful Improvements in Stuffing-Boxes, of whichthe following is a specification.

For a certain class of stuffing-boxes, especially for those admitting ofmotion in all directions, elasticity has hitherto been producedexclusively by means of spiral springs or spring-plates, which, however,when exposed to high temperaturessuch as occur, for instance, insuperheated steam and gas enginesreadily lose their flexibility throughthe constant influence of the hot gas, and thus often cause breakdowns.Furthermore, the refitting of such springs is difficult, requiring muchtime, and the construction is generally complicated and expensive. According to my invention all these drawbacks are effectually overcome inthe simplest possible manner and a stuffing-box provided which insuresample elasticity of the-packing in the longitudinal direction of the rodwith out the degree of resilience being liable to be affected byexternal influences.

The invention is illustrated in the accompanying drawings, in whichFigure 1 is a longitudinal section through the stuifing-box. Fig. 2 is adetail view showing the split ring employed. Fig. 3 is an edge view ofthis ring. Fig. 4 is a section through the bush into which the splitring fits.

As will be seen from Fig. 1, a packing of any kind may be taken, the onerepresented consisting of pairs of metal rings a 0. elastically expandedby the rod g and arranged in annular chambers This packing is locatedbetween a movable collar or ring I), having a spherical surface andfitting into the gland e, and a split ring 0, which is a loose fit onthe rod 9 and presents a conical surface 0, thus constituting a kind ofball-and-socket joint with the bush (1, which has a conical seating clto receive it. The bush (I may naturally be dispensed with and theconical surface provided on the box itself. The ring 0 by reason of itsresilience exercises elastic pressure at right angles to the axis of therod,

and in conjunction with the bush d, in view of the conical surfaces ofcontact 0 d, it also exerts elastic pressure in the direction of the rodaxis, whereby the packing is pressed tightly together. In order that thering 0,

despite variation in its diameter owing to alteration of thelongitudinal pressure, may always cooperate with the bush d whenrequired in the manner of a ball-and-socket joint, the members 0 (Z areso formed that universal rotary motion between them can take place inevery position and that the in clination of various spherical elementsofthe two contact-surfaces of the annular members to the axis of the ringis such that the conditions of resilience attained are those mostfavorable to the purpose in view. The two supporting-surfaces can thusbe produced by rotation of a curve or of a straight line andappropriately combined. In the construction shown in the drawings thering 0 presents a spherical zone of relatively small radius and the bush(1 a zone of larger radius. The departure from the theoretically correctspherical surfaces is not objectionable in practice, since theresilience of the ring 0 and the elasticity of the material admit ofintimate contact between the two surfaces '0 d in every position ofrotation, the more so since such rotation only occurs within strictlimits.

Any suitable packing may be employed. That shown is ground steam-tightinto special annular chambers f and consists of pairs of split rings a athe joints of which are ,covered by a tightly-fitting spring-ring a Thepacking is so located between the rings 1) and c that it can readilyaccommodate itself to any deviations of the piston-rod from the centerline of the cylinder. In this manner and in view of the abovedescribedball-andsocket -joint arrangement the inner surface of the packing willalways make close contact with the rod even on bending of the latter, sothat a thoroughly-steam-tight joint is insured.

The self-acting ring 0 can also be advantageously employed even in casesin which motion of the packingin all directions is not a requirement,but merely elasticity in the longitudinal direction of the rod, such asin the case of vertical piston -rods. In any event it overcomes theeffect of any expansion due to heat and maintains the packing underpressure even during the return stroke of the piston or when there is avacuum in the cylinder.

Having thus described my invention, I claimas new and desire to secureby Letters Patent 1. In combination, a stuffing-box, and a resilientsplit ring loosely fitting the packed rod and adapted to bear againstthe packing, said box and ring presenting such conicalmutually-contacting surfaces as enable the ring to slide in the box inaxial direction, substantially as described.

2. In combination, a stuffing-box, an an nular bush at the inner endthereof, and a resilient split ring loosely fitting the packed rod andadapted to bear against the packing,

said bush and ring presenting such conical mutually-contacting surfacesas enable the ring to slide in the box in axial direction, substantiallyas described.

3. In combination, a stufling-box, a loose collar at the gland end andan annular bush at the cylinder end thereof, and a resilientsplit ringloosely fitting the packed rod and adapted to bear against the packing,said bush and ring presenting such conical contacting surfaces as enablethe ring to slide in the box in axial direction, substantially asdescribed.

In testimony whereof I have hereunto signed my name in the presence oftWo subscribing Witnesses.

JOSEF SIEGER. Witnesses:

OTTO KoNrc, WALTER SIBLEY,

